This font allows the creation of Celtic knotwork in many different levels of complexity. Upper case is white strands on black background, the same letter in lower case are black strands in white background.
See more:
https://fontstruct.com/fontstructions/show/27293/weaver
https://fontstruct.com/fontstructions/show/2139530/g1-thorium-1
https://fontstruct.com/fontstructions/show/2388858/nodus-hibernicus-fs
This is a clone of ztrands eYe/FS